loosen your gas cap to make sure you don't have a vacuum lock instead of vapor lock. I was having the same trouble. First trip today without the locking gas cap, and the car drove normal after a 40 minute trip. I still need to do more testing, but it looks promising so far.

Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph